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Photocatalyst material and preparation method and application thereof

A photocatalyst and catalyst technology, applied in the field of photocatalytic materials, can solve the problems of poor stability, low efficiency of organic pollutants, low sunlight absorption rate, etc., and achieve enhanced binding ability, excellent visible light absorption ability, and obvious killing effect Effect

Active Publication Date: 2019-02-15
TONGJI UNIV
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Problems solved by technology

Both of these solar energy utilization methods rely on efficient photocatalysts. Photocatalysts are catalysts that can absorb and convert solar energy and catalyze chemical reactions. Traditional photocatalysts such as TiO 2 (Energy & Environmental Science, 5(2012) 6506-6512), CdS (The Journal of Physical Chemistry C, 115(2011) 11466-11473), etc. are facing problems such as low sunlight absorption rate and poor stability, which lead to solar hydrogen production efficiency and degradation Organic pollutants such as formaldehyde are not efficient

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  • Photocatalyst material and preparation method and application thereof
  • Photocatalyst material and preparation method and application thereof
  • Photocatalyst material and preparation method and application thereof

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Embodiment Construction

[0038] The present invention will be described in detail below in conjunction with specific embodiments.

[0039] A photocatalyst catalyst material is prepared through the following steps:

[0040] 1. Preparation of metal oxide precursors:

[0041] (1) Mix acetic acid and acetic anhydride at a temperature of 263K-283K to obtain a transparent solution S1;

[0042] (2) Under the condition that the temperature is 273K-283K, tantalum pentachloride and absolute ethanol are mixed to obtain a transparent solution S2;

[0043](3) under the condition that the temperature is 273K-283K, the solution S1 is mixed with the solution S2, and stirred vigorously to obtain the mixed solution S3;

[0044] (4) Add calcium nitrate tetrahydrate and lanthanum nitrate hexahydrate to the mixed solution S3 at a temperature of 273K-283K, and stir vigorously until the solution is clear, which is marked as solution S4;

[0045] (5) Place the solution S4 in an oven and keep it warm at 303K-373K for 2-72 ...

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Abstract

The invention relates to a photocatalyst material and a preparation method and an application thereof. The catalyst material is a perovskite type metallic nitrogen oxide which has a spherical porous microstructure, the grain size of which is 100-500 nm and the molecular formula of which is La(1-x)CaxTaO(1+y)N(2-y), wherein x is greater than or equal to 0 and y is smaller than or equal to 1. The photocatalyst material can be used for preparing a water decomposing hydrogen making photocatalyst and a formaldehyde degrading photocatalyst, has the characteristics of responsive to visible light andcontinuously adjustable light absorption, and can be applied to solar hydrogen making and solar environment purification (formaldehyde).

Description

technical field [0001] The invention belongs to the technical field of photocatalyst materials, and in particular relates to a photocatalyst catalyst material and its preparation method and application. Background technique [0002] With the continuous development of human society, the existing energy structure has become more and more difficult to meet the growing energy demand of human beings. The three main fossil energy reserves (oil, natural gas and coal) will be exhausted in this century at the current energy consumption rate, and it is imminent to find alternative energy sources as soon as possible. On the other hand, the exploitation, use and discharge of fossil fuels have induced serious environmental problems, such as climate warming, ocean acidification, air pollution, etc., which are not conducive to the sustainable development of society. Therefore, developing or finding a new sustainable energy utilization method is the key to solving the above problems. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J31/28C25B1/04C25B11/06B01D53/86B01D53/72
CPCB01D53/8668C25B1/04C25B11/04B01J27/24B01J31/003B01J31/28B01J35/39Y02E60/36
Inventor 徐晓翔汪亚威喻金星
Owner TONGJI UNIV
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